Property in Swift - Computed property | Property Observers (WillSet & DidSet)

   Computed property -  Computed properties are part of a property type in Swift.  Stored properties are the most common which save and return a stored value  Computed properties calculate (rather than store) a value. A computed property provides a getter and an optional setter to indirectly access other properties and values. Computed property in swift is an interesting topic as you can write code inside a property in swift. Computed properties are provided by classes, structures, and enumerations but stored properties are provided only by classes and structures. This computed property swift tutorial has some tips on how to use the computed property in the right way and avoid the common mistakes that swift programming beginners do while computed property. Example :- Computed property A Calculate Simple Intrest struct CalculateLoan {      var amount : Int      var rate : Int      var years : Int      var simpleInterest: Int {          get {              return ( amount * rate
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How to Change App Multiple Language - localization at runtime in swift



Then App Open Default Language -
Add Source code  - AppDelegate
@UIApplicationMain


class AppDelegate: UIResponder, UIApplicationDelegate {



let currentLanguage = "pt-PT"



func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {

UserDefaults.standard.set(currentLanguage, forKey: "AppleLanguage")

Bundle.swizzleLocalization()

return true

}

}



extension Bundle {

static func swizzleLocalization() {

let orginalSelector = #selector(localizedString(forKey:value:table:))

guard let orginalMethod = class_getInstanceMethod(self, orginalSelector) else { return }



let mySelector = #selector(myLocaLizedString(forKey:value:table:))

guard let myMethod = class_getInstanceMethod(self, mySelector) else { return }



if class_addMethod(self, orginalSelector, method_getImplementation(myMethod), method_getTypeEncoding(myMethod)) {

class_replaceMethod(self, mySelector, method_getImplementation(orginalMethod), method_getTypeEncoding(orginalMethod))

} else {

method_exchangeImplementations(orginalMethod, myMethod)

}

}



@objc private func myLocaLizedString(forKey key: String,value: String?, table: String?) -> String {

guard let appDelegate = UIApplication.shared.delegate as? AppDelegate,

let bundlePath = Bundle.main.path(forResource: appDelegate.currentLanguage, ofType: "lproj"),

let bundle = Bundle(path: bundlePath) else {

return Bundle.main.myLocaLizedString(forKey: key, value: value, table: table)

}

return bundle.myLocaLizedString(forKey: key, value: value, table: table)

}




Let’s get started by choosing languages 😄


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